What are you doing?
I'm working on the computer.
What is he doing?
He's taking pictures.
We / volleyball (x)
We're not playing volleyball
What are you doing?
I'm talking on the phone.
I'm not playing ping pong
I'm playing golf
I / soccer (x)
I'm not playing soccer.
They're not playing tennis
They're playing ping pong
What are you doing?
I'm doing homework
I'm not playing football
I'm playing basketball
What is he doing?
He's watching TV.
What is she doing?
She's listening to music
We / baseball (x)
We're not playing baseball.